Self-heating soldering-iron.



L. S. JOHNSON.

SELF HEATING SOLDERING IRON.

APPLICATION FILED AUG. 3. I9I7.

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Patented Mar. 19, 1918.

LLOYD S. JOHNSON, OF DAYTON, OHIO.

SELF-HEATING SOLDERINGr-IRON.

Specification of Letters Patent.

Patented Mar. 19, 191.8.

Application led August 3, 1917. Serial No. 184,344.

T 0 all whom t may concern.'

Be it known that LLOYD S. Jol-raison, a citizen of the United States, residing at Dayton, in the county of lsontgomery and State of Ohio, has invented certain new and useful Improvements in Self-Heating Soldering-Irons, of which the following is a specilication.

rllhis invention relates to a combined blow torch and soldering iron. The object of the invention is to provide a self-heating solder-` ing iron the parts 0f which are compactly arranged to produce an eflicient and easily manipulated device of this character. To these ends the soldering iron inv its entirety consists essentially of an elongated cylinder which constitutes th fuel reservoir, and an air pump extended into one end of said reservoir, and a burner on the other end thereof with fuel-feedingl devices on the interior of the reservoir and between. the air pump and the burner and so constructed and arranged to provide an efficient feed of the fuel. n Y

Referring to the accompanying drawings, Figure 1 is a. horizontal longitudinal side elevation of my improved self-heating soldering iron. Fig. 2 is a horizontal longitudinal sectional View of Fig. 1 somewhat enlarged' and parts of which are broken out to facilitate space. Fig. 3 is a longitudinal horizontal sectional elevation of the device with parts broken away and the burner detached showing some modiiications which adapt the invention to the smaller size. Fig.` 1 is a cross sectional view on the line 1- L1 of Fig. 2. Fig. 5 is a cross sectional view on the line 5` 5 of Fig. 1.

In the description to follow similar reference characters indicate corresponding parts of the drawings. 1 designates a cylinder which constitutes the handle of the soldering iron and serves to contain the gasolene or other fluid from which the heat is generated. 8 is a cylinder which is projected into one end of the cylinder 1 through a stuiiingr box 5 which holds it in position. l/Vithin the cylinder 3 a pump cylinder 3 is placed and held in position by a stuffing box 6 which has a screw threaded engagen ment with the cylinder. 3 and controls the removal of the pump cylinder 3 when it becomes necessary to charge the cylinder 1 with gasolene. The cylinder 3 is provided with a knurled operating member -i which engages the screw threads of said cylinder- 3 and by which it is turned in the stuiiing box 5 to operate the needle valve lli to be again referred to. The pump 3 is adapted to fnrnishair to the interior of the cylinder 1 and the same contains a piston S. rlllicre is an opening 9 in the bottom of said pump cylinder through which air is forced by said piston. The opening 9 is closed by a suitable valve 10 which is held upon its seat by a coil spring 11. lllhen the pressure of the air is sufficient the valve 10 is forced thereby from its seat and the air is dis charged into the cylinder 1 through tl e opening 9. The cylinder 8 has an open extended portion 13 which. terminates in a head or hollow member 12 to which the rod 14: of the needle valve is secured. The end 2 of the cylinder' 1 opposite the pump 3 terminates in a conical casting to the smaller end of which a casting 3 is screwed, to be again referred to. 15 designates a stem, one end of which is screwed .into the end of the cylinder 1. rThe valve rod 11 passes through this stem 15 and the inner end of the stem provides a guide for said valve rod. For a portion of its length the stem 15 on the interior thereof has a larger bore 15 into and through which the fuel or gasolene passes to the chamber i3 in the casting 3. The stem 15 has ports 18 and 19 in the side thereof and telescoped onto the stem 15 is a sleeve` 16 which slides thereon according to the position of the soldering iron or cylinder 1. For example, when the cylinder 1, as shown in Fig. Q, is moved to a vertical position with the pump enddownward the sleeve 16 slides downward to the limit of its movement which limit is measured by a stop 17 which surrounds the inner end of the stem 15. rThe sleeve 16 has attached to it a pipe 2l that lies within the cylinder and is provided at its free end with a series of perforations 21 through which the fuel or gasolenev enters said pipe 21. At the point where the pipe 21 is secured to the sleeve 16 it has the form of an elbow to which is secured a weight 22. The sleeve 16 has another inlet pipe 20 secured theretoA which has a weight 20. These pipes 20 and 21 where they enter the sleeve 16 are adapted to communicate with one ofthe ports in the stem 15 and to thus conduct the gasolene or fuel to the interior of the stem 15. 1t will be noted in Fig. 4l that there is a channel 18 in the stem 15 with which the ports 18 and 19 communicate so that the oil entering one of said ports will flow through the channel 18 and will enter the interior of the stem 15 through both ports. The effect of the weights 22 and 20 on the pipes 20 and 21 is to cause said pipes to occupy a lower position so that they will communicate with one of the ports in the stem 15. As shown in Fig. 2 the inlet pipe k2O communicates with the port 19 in the stem 15. 1f the soldering iron as a wholeV is changed from its position as shown in Fig. 2 to a more or less inclined position or a vertical lposition the sleeve 16 will. slide on the stem 15 and the pipe 21 will communicate with the port 19in said stem,'the purpose being to provide for the feeding of the gasolene to the burner when the soldering iron is held in various positions by the hand. The casting 3 constitutes the body of a burner. The needle valve has a screw threaded engagement with said casting 3 and as the cylinder 3 is turned by the finger piece 4 the needle valve is caused to regulate the opening through which the gasolene `is admitted. 25 is a needle valve which controls a passage 24 through which the gasolene is conducted from the chamber 23, the chamber 23, as before stated, being in communication with the passage 15 on the interior of the stem 15. rEhe passage 24 which, as before stated, is controlled by the valve 25, communicates with a passage 26.Y Extending from the passage 26 is a return pipe 27 the other end of which communicates with a passage 28 in the head or burner orcasting 3. The pipe 27 is inclosed in a cylinder 30, and said cylinder 30 is provided with air opening 29 through which air is admitted to mix with the gas generated in the burner. In the initial operation of the soldering iron the needle valve l14 is 'removed from its seat to admit gasolene through the valve into Yan ignition pan 31, a sufficient quantity 0f gasolene passing into said pan through an opening 32. The initial heat causes the liquid to gasify and the gasolene passing into the burner is vaporized by the heat of the burner. A soldering iron or point 34 is secured to the burner and in alinement therewith by means of y an extended arm 35 which is secured to the end of the burner cylinder 30 by a clamp 36. The soldering iron or point 34 has-a flaring end 33 which receives the heat generated in the burner and the attachment with the burner is made through a clamping member 37 which surrounds the soldering iron on the outside ofthe flaring end 33, the clamp 37 receiving the end of the pin or arm 35. In Fig. 3 the needle valve 14 controls the passage of the gas into the burner' as the burner becomes sufciently hot from the initial ignition of the gasolene admitted to the cup 31. TheY form shown in Fig. 2 in whichv v the return pipe the extra valve 25 is provided is intended for the larger sizes of soldering irons. Smaller sizes may be constructed in accordance with Fig. 3 of the drawing, in which case the extra valve 25 is eliminated. 1n this case the needle valve 14 controls both the passage of 'gasolene into the burner and the resulting gas or vapor generated therefrom within the burner. rlhe passage 23 in the end 2 communicates with a chamber 38 in the burner. The gasolene and the resulting gas passes from the chamber 38 through 27 and into va chamber 39 from whence the gasolene passes out of the burner and into the ignition cup 31 through 80 port 32.V The'gasolene is initially admitted f to the ignition cup 31 and after the burner has become sufficiently hot to generate gas the gasolene entering chamber 38 through the valve 14 is instantly generated into gas. Having described my invention, I claim: 1. In a self-heating soldering iron, a cylinder adapted to'contain fuel, an air pump communicating with said cylinder, a burner attached to said cylinder, astem on the interior of the cylinder communicating with the burner, a needle valve extending through said stem into the burner and attached to said air pump, said stem having ports therein, a sleeve slidably supported on said stem, and feed pipes on the interior of the cylinder and attached to said sleeve and adapted to communicate with the ports in the stem depending upon the position of theV soldering iron.

2. In a self-heating soldering iron, a cylinder adapted to contain fuel, a burnerY connected with said cylinder having a lateral n passage, an auxiliary valve controlling said 'Y lateral passage, afpump extending into said cylinder, a stem within said cylinder communicating with the lateral passage in the burner, va needle valve extendingthrough said stem and controlling the fuel after it is admitted through the lateral passage, a sleeve slidably mounted on said stem, and feed pipes connected to said sleeve and adapted to communicate with' ports in the stem whereby fuel is admitted to thelateral Y passage in the burner and thence to the needle valve. .g

3. In a self-heating soldering iron, acylinder, an air pump communicating with said cylinder, a burner attached to said cylinder, a stem in said cylinderhaving a fuel passage and ports communicating with the burner, a needle valve connecting with'the air pump and qpassing through said stem and lcontrolling the admission of fuel to the burner, 'a sleeve slidably' mounted on 125 said stem, and feed pipes within the cylin-. der attached to said sleeve and adapted to communicate with the passage in the stem whereby fuel is discharged tothe burner.

4. In a Self-heating soldering iron, a cylinder adapted to contain fuel, an air pump communicating With said cylinder7 a stem on the interior of said cylinder having a port and a passage through which the fuel is conducted from the cylinder, a burner connected With said cylinder and providing a. fuel chamber therein at the end of the cylinder Which communicates With said stem, and a needle valve extending through said stem into the burner and connected with the air pump.

5. In a self-heating soldering iron, a cylinder forming a handle and a reservoir for the fuel, an air pump communicating with said cylinder, a stem in said cylinder having a port and passage forming an outlet from the cylinder, a burner connected With said cylinder and having a passage communicating with the stem, a needle valve controlling the outlet from the burner, a sleeve slidably supported on the stem, and feed pipes on the interior of the cylinder and connected with said sleeve, said feed pipes being adapted to communicate with the port in the stem whereby the fuel is conducted to the burner through said port and the needle valve.

6. In a self-heating soldering iron, a cylinder constituting a fuel reservoir, an air pump Within one end of said cylinder, a burner attached to the other end of said cylinder having a continuous fuel passage, a needle valve attached to the air pump and extended into the burner, and fuel feeding devices including a stem and a sleeve thereon on the interior of the cylinder controlling the passage of fuel to the fuel passage in the burner.

7. A cylinder constituting a fuel reservoir, an air pump extended into said cylinder, a burner attached to the end of said cylinder opposite the air pump and having a continuous fuel passage therein, an auxiliary valve in said burner controlling the initial admission of fuel, a needle valve controlling the discharge of the fuel, said needle valve being connected With a cylinder inclosing said air pump, a stem on the interior of the reservoir cylinder communicating with the fuel passage in the burner, a sleeve slidably mounted on said stem, and Weighted feed pipes connected to said sleeve and adapted to communicate with the passage in the stem according to the position of the sleeve on the stem.

In testimony whereof I aiiix my signature.

LLOYD S. JOHNSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

